OS_Byte 20 (changes)
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Programmer's OS Reference SWI Manuals Calls
» Part OS_Byte 15 – SWI Calls
» OS_Byte 20OS
» OS_Byte
» OS_Byte 20
OS_Byte 20
(SWI &06)
| Entry | |
|---|---|
| R0 | 20 (&14) |
| Exit | |
|---|---|
| R0 | Preserved |
| R1 | Corrupted |
| R2 | Corrupted |
Use
The purpose of this call is to reset the font definitions.VDU font definitions.
Notes
This call is used to reset the shape of the printable ASCII characters in the range of 32-127, which may be modified with VDU 23,32? – 255. To reset the whole or a smaller group of character definitions, use OS_Byte 25.
See also
- OS_Byte
- OS_Byte 25
- VDU 23,32?
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